Molding machine



R. F. RINGLE MOLDING MACHINE Filed May 29, 1929 3 Sheets-Sheet l fig.

Dec. 23, 1930.

m T u r u LN m l 7-H m L m M w fi numTg N H .FIIIIIFIIIIIIIII Dec. Q3, 1930. R. F. RINGLE 1,786,171

MOLDING MACHI NE Filed May 29, 1929 3 Sheets-Shet 2 R. F. RINGLE MOLDING MACHINE Filed May 29, 1929 3 Sheets-Sheet 3 INVEN R I -71 Y in Patented Dec. 23, 1930 MOLDING Application area May 29,

'My invention. refers to improvements in molding machines of the general type illustrated in prior patent of Austin and Ringle No. 1,243,030, of October 16, 1917. It has in I view to provide means for making operative engagement between the raising and lowering equalizing table and the flask for accurate engagement therebetween and-for lowering the flask from the pattern aftermolding, and reversal of the flask;

The inventlon specifically relates to the construction of the equalizingtable whereby any inequalities or variations in parallelism between the co-operating parts maybe compensated for 'so as to effect lowering of the flask evenly and directly away from the suspended pattern, avoiding any disturbance of the molded sand during such removal and leaving the pattern suspended from the supporting turnover plate.

vThe complete molding machine and the present improvement are embodied in an entire operative mechanismincluding the jarring table on which the flask and its con- 2 tained sand are vibrated or agitated, turnover mechanism by which the flask'a-nd the packed sand surrounding the pattern are elevated away from the jarringtable and rotated onehalf revolutionfor location above the lowerse ing mechanism, and such lowering mechanism and equalizing table, the latter forming the subject matter of the present invention. In the drawings,illustrating. one preferred embodiment of the invention: f

Fig. 1 is a general view in elevation, partly in section and partly broken away, showing the several main elements of the installation;

Fig. 2 is a general plan View of the complete apparatus showing the turnover plate in position for application of the molding flask;

Fig. 3 isan'enlarged plan viewof the sup porting and operating element-s of the' equah izing table; i Fig.4 is a view tion;. and V v Fig. 5 is a cross sectional view. on line V -..V

of Fig. 3.

The. turnover .and; flask lowering mecha 59 nism is generally indicated at A and isin PATENT-OFFICE. 3

ROBERT F. .RINGLE, on zELIENorLE, PENNSYLVANIA MACHINE l 1929. se -41m 266,864. I

operative relation to the jarring machine B, both of which are of 'we'll known construction, and generally similar to the apparatus shown in the above mentioned patent.

The jarring machine B is provided with the usual table 2 upon which the flask 3 is supported with the intervening pattern supporting turnover plate 4. These elements, as well as the vibrating mechanism for j arring! the table, are of well understood construction and operation, andneed not be further-described. I 1 v The turnoverplate. 4 is provided at each end with lateral socket. projectionse having tapered sockets for engagementby tapered. trunnions 6 of the usual turnoverarms 7 by which the plate 4 and flask 3 are swung over upwardly above the.with drawing and equalizing table, as indicated in dotted lines. in Fig. '1. r

Arms 7 are mountedon rock-shaft 8 extending across in' bearings 9 of the main frame of themachin'e andoperatively connected by lever 10 and connecting rod 11 with plunger 12 of cylinder 13. Said cylinder and its parts are also generally similar tothat of the said patent, and operate to throw lever 10 and 'rock-shaft 8 around through onequarter revolution more or less.

f Rotation of the turnover plate 4 and flask 3 is effected by restraining or limiting actionof controlling rods 14 pivotally mounted" at 15 and connected at 16 with the trunnions 6, so that as the turnover arms swing. upwardly and over, the position of the flask isreve'rsed abovetheequalizing table as shown. 7

' Flask 3 is provided with the'usual bottom board and battens 17 against which the contacting elements of the equalizing table e11 gage when elevated.

Equalizing table 18 [comprises amiddle base plate which is fixedly mounted upon the upperend of plunger 19 of cylinder 20 con nected by aconduit 21 with controlling valve f the same lnsideeleva- C more fully-'illustratedand described in my companion: applicationSerial Number 366,- 8 3, May 29,1929. r r

Bed. plate: or table 18" is provided with ,downwardlyextending guide rods 22 and. 22a.

7 Rods 22 are provided with cushioning springs 23 and 24 adapted to absorb the shock of impact on either downward or upward movement against the intervening guide abutn'ients 25 and 25a.

Table 18, which generally conforms more or less to the face area of the bottom board and battens of the flask, is provided along each side with resiliently mounted contact bars or rails 26 having upper contacting edges 27 for engagement against the under side of the battens or other surface port-ions of the under side of the reversed flask 3.

One of the objects of the present invention is to so mount the rails 26 that their contacting edges 27 will independently engage against the surface to be supported, and. will automatically adjust themselves thereto, one independently of the other, upon coming into contact therewith, whereby to entirely support the flask when fixed in such position, for positive and accurate lowering thereof with out danger of harmful variation of the flask and molded sand in withdrawal from the pattern.

For such purpose each rail is mounted by portions intermediate of its ends upon resisting cushioning springs 28 seated in casings 29 therefor, mounted on the outer edge portions 30 of table 18. Each bar or rail 26 is provided with enlarged and downwardly open cup-shaped housings 31 telescoping over the members 29 and providing an enclosing bearing for the springs.

As thus constructed, as the equalizing table is brought upwardly into contact with the under side of the inverted flask. and with the slight pressure present at the upward end of the stroke of plunger 19, each rail will automatically accommodate itself to such under side, either in parallelism or with more or less deflection at one side or the other or both, dependent on any corresponding variation in one or he other or both sides of the flask bottom.

For the purpose of positively fixing the rails in such adjusted position so as totemporarily hold them in proper contacting relation with the flask, during lowering movement thereof by release of pressure from cylinder 20, I provide the holding mechanism for the rails illustrated in Figs. 2 and 3.

The rails themselves lie inwardly against or in close proximity to the outer side faces of upstanding posts or abntments 32 arranged along each side of the equalizing table 18,

against which the rails are to be tightly clamped and held against accidental or other movement during lowering of the table.

For such purpose I provide a lever 33 pivotally connected at 34 and 35 with oppositely extending links 36 having integral bolts'38, extending outwardly in opposite directions through th middle portion of each rail, and having terminal adjusting and securing nuts 39. The opposite end oflever 33 is connected at 40 with the clevis terminal 41 of piston rod 42 of the spring-retracted plunger 43 in cylinder 44. When it is desired to fixedly hold the rails 26 in tight abutting contact with posts 32, pressure is applied to plunger 43 by flexibly connected conduit 45 from any source of pressure, subject to the opening and closing of a suitable controlling valve, not shown, at any convenient location within reach of the operator.

hen thus tightly clamped, and the flash 3 has been released from the turnover plate by removal of clamps 46, the flask resting evenly and stably on the edges 27 of the rails may be positively and evenly lowered downwardly below the pattern, so that the turnover plate may then be returned to its initial position over the bumper and the pattern removed for substitution by an additiona pattern and flask.

The lowering of the flask, under control of valve C, is at first comparatively slow and then more rapidly, or with any desired variation in speed under control of the operatin g valve C, as is more fully described in my companion application mentioned.

The construction and operation of the invention will be readily understood and appreciated from the foregoing description and it will be found to be continuously etticient and to avoid the usual objections and trouble incident to improper or variable lowering of the flask, avoiding any even slight variation, and resulting in a perfectly formed mold cavity. The side rails may be of any desired design, dimension, spacing, or otherwise changed or modified to suit conditions of use, and the mechanism itself may be changed or varied by the skilled mechanic, but all such changes are to be understood as within the scope of the following claims.

I claim:

1. In a bumping machine, the combination of a flask support, means for raising and turning the flask support, and a flask supporting equalizing table having a pair of independently adjustable vertically cushioned supporting rails.

2. In a bumping machine, the combination of a flask support, means for raising and turning the flask support, and a. flask supporting equalizing table having a pair of in dependently adjustable vertically cushionml supporting rails and means for holding them in adjusted position;

3. In a bumping machine, the combination of a flask support and flask thereon, means: for raising and turning the flask support and flask to inverted position, and a flask support ing equalizing table having resiliently mounted vertically cushioned bearing elc ment-s for contact with the flask, and tightening means therefor.

4. In a bumping machine, the combination of a flask support and flask thereon, means til Ill)

- 56 said lever.

for raising and turning the flask support and flask to inverted position, and a. flask sup porting equalizing table having a pair of independent resiliently mounted vertically cushioned flask bearing rails adapted to make supporting contact with the flask, and means on the table for fixedly holding the railsin supporting position.

In abumping machine, the combination of a flask support and flask thereon, means for raising and turning the flask support and flask to inverted position, and a flask supporting equalizing table having a pair of independent resiliently'mounted vertically cushioned flask bearing rails adapted to make supporting contact with the flask, resisting abutments on the table, and means for ti htening the rails against said abutments in fl ask supporting position. 2g 6. In a bumping machine, the combination of a flask support and flask thereon, means for raising and turning the flask support and flask to inverted position, a vertically movable plunger, and a flask supporting equalizing table mounted on the plunger having resiliently mounted vertically cushioned bearing rails for contact with the flask and tightening means therefor.

7. In an equalizing table for supporting and lowering a flask from its pattern, a frame having oppositely located bearing members, resilient supporting means therefor, resisting abutments, and lever mechanism for'binding the bearing members against said abutments.

8. In an equalizing table for supporting and lowering a flask' from its pattern, a frame having oppositely located bearing members, resilient supporting means therefor, resisting abutments, lever mechanism for binding 40 the bearing members against said abutments,

and a fluid actuated plunger for actuating the lever mechanism.

9. In an equalizing table for supporting and lowering a flask from its pattern, a frame having oppositely located bearing rails, re-

silient supports therefor, resisting abutments for the rails, a lever having link connection with therails, a cylinder, and a fluid actuated plunger in the cylinder connected With- In testimony whereof I hereunto aflix my signature.

. ROBERT F. RINGLE 

